Lake Lamoure is a 494-acre productive, nutrient-rich eutrophic lake in LaMoure County, North Dakota with a maximum depth of 31 feet (12-foot average). Water quality is graded C based on 2 sampling years through 2021. The lake supports 7 documented fish species including Northern Pike, Walleye, and Black Crappie. Public access is available with 1 public boat landing. Compared to the 3 other monitored lakes in LaMoure County, Lake Lamoure ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, North Dakota DNR, last sampled 2021-10-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Moderate clarity, visible to about 8 ft. Chlorophyll-a: 18.4 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 18.4 µg/L | C |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 31.4 ft |
| Average Depth | 12.2 ft |
| Surface Area | 494 acres |
| Shoreline Length | 11 mi |
| Public Access | Yes |
Where to stay near Lake Lamoure
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake Lamoure
Recreation & Access
Water Temperature
Lake Lamoure averages about 61°F at the surface in summer, usually warmest in Aug (about 63°F) and coldest in May (about 48°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 14 field readings (2019–2021) via the EPA Water Quality Portal. See the full Lake Lamoure water temperature breakdown →
Location
County Ranking
Ranked #3 of 4 lakes in LaMoure County
Cleaner Lakes Within 30 Miles
Lake Lamoure holds Grade C. 2 nearby lakes hold higher grades.
- ATwin LakesLaMoure County · 7.1 mi · Two grade letters higher (C → A)
- BPheasant LakeDickey County · 28.1 mi · Higher grade (C → B)
Nearby Lakes in LaMoure County
Explore Lake Lamoure across LakeGrade
Fish species and top-graded lakes across North Dakota
Fish species and best lakes in LaMoure County
Species activity outlook by water temperature and season
Where to stay at North Dakota's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
North Dakota's cleanest and most-polluted lakes, ranked
More North Dakota Lake Rankings
Other Grade C Lakes in North Dakota
Eutrophic Lakes in North Dakota
Compare Lake Lamoure With Nearby Lakes
More records, surveys & data sources
Reservoir Info (USACE NID)
Lake Lamoure is a man-made reservoir impounded by the Cottonwood Creek Dam (completed 1973), built primarily for recreation on the Cottonwood Creek; earth-type dam, 76 ft tall and 1,380 ft long.
- Surface area
- 494.1 ac
- Normal storage
- 8,076 ac-ft
- Max storage
- 16,839 ac-ft
- Drainage area
- 240 sq mi
- Hazard class
- Significant
- Owner
- City of LaMoure
All listed purposes: Recreation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID ND00011 · Operator website
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Depth, fish, and access data from North Dakota Game & Fish
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2021-10-01
Monitoring stations: 1